Zapco Z-400.2 AP 2-Channel Class AB Audiophile Amplifier

$1,599.00 OR

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Model: Z-400.2AP UPC: 8033373002915 Item: 180129

Product Information

The Ultimate SQ Amp

For the new Z-AP series amplifiers, ZapCo took the best of their LX amps and tweaked the circuitry to perfection. In the signal path, they replaced the electrolytics with the high-end WIMA poly caps and used a new low-noise, audio op-amp for the input stage with the smoothest audio op-amp they could find. They doubled the output drivers and increased the operating voltage of the matched final output devices. To get heat off the output devices faster, and increase efficiency, they used a new aerospace insulator. At the differential input stage, they used 0.1% resistors, not 1% but 0.1%... to assure the lowest possible floor. They developed our own patented, multi-ground RCA connectors with extra heavy gold plating for perfect signal transfer. Zapco even improved the low noise gain pots had added detents to make watching levels a breeze. To top it all off, they gave it a new look, with a matt black finish and a solid copper plate with the logo and serial number engraved for posterity.


  • 2-Channel, Class-AB, Competition Audiophile Amplifier
    • Power @ 4Ω: 2 x 400 watts
    • Power @ 2Ω: 2 x 600 watts
    • Power @ 4Ω Bridged: 1 x 1200 watts
  • Signal to noise ratio of over 110dB
  • Coupled the output drivers
  • Highest HFE (Gain) Sanken selected output devices
  • Differential balanced input stage
  • 0.1% resistors for lowest possible noise floor
  • TI LME49720 (BJT) op-amps on the inputs
  • TI LME49720 (BJT) op-amps in the signal path
  • WIMA MKS2 series caps in the signal path
  • Extremely low ESR caps throughout
  • Proprietary patented RCA connectors



  • Power @ 4Ω: 2 x 400 watts
  • Power @ 2Ω: 2 x 600 watts
  • Power @ 4Ω Bridged: 1 x 1200 watts
  • THD @ Rated Power  < 0.05%
  • Signal to Noise Ratio > 110dB
  • Frequency Response 10Hz to 30,000Hz ±1dB
  • Input Sensitivity 1v to 9v
  • Dimensions (W x H x D): 7.48" x 2.44" x 18.89"


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